利用阵列孔径信息的到达角估计新方法

A Novel Method for DOA Estimation Exploiting Array Aperture

孔径信息能改善阵列信号参数估计。提出一种利用阵列孔径信息的到达角估计新方法,阵列由三个电磁矢量传感器呈L型排列构成,阵元间距不要求一致,且能超过入射信号最小波长的半波长。解模糊时将矢量叉乘方法获得的方向余弦值与利用孔径信息获得的方向余弦值相比较,通过模糊次数的搜索得到方向余弦的精确估计值。仿真结果证明上述方法的有效性。

A novel method for direction of arrival （DOA） estimation of electromagnetic vector sensor is presented exploiting array aperture. The L shape array is composed of three electromagnetic vector sensors, and space between two vector sensors may be different, in addition, it can be more than half-wave of impinging source. By contrasting direction cosine acquired with vector cross product and exploiting the array aperture, the better of direction cosine is obtained. Computer simulation results are provided to demonstrate the effectiveness of the proposed algorithm.